Every fixture needs a vent, but that does not mean every fixture needs its own vent. They can be combined and/or shared when possible. A toilet, and...
It is above the washer drain so it is wet vented properly. Even the washing machine does not "need" the vent if it is as close to the riser as shown....
I think you are a victim of hyperbole, foisted by those who have a economic interest in eliminating lead from brass. As stated by a recent editorial...
There is a lot more designed for 110/120v than there are 220/240v. BUT, if there are devices on both legs of a shared neutral, and you disconnect the...
A drain pan under the heater is completely worthless unless you have somewhere to run its drain pipe. All a permit and inspection does, assuming you...